OK, I just built a new computer, and wish to now sync the BlackBerry with that one, instead of the old one. I installed Desktop Manager, (the exact version I was running before), then installed the proper release of 8700 software (same one I'm running on the BB) - and when I connect the BlackBerry and select "Application Loader" I get the message that "no system software was found for your device."

So, after doing the above installs, I even went so far as to copy the entire "Program Files/Research in Motion/BlackBerry" directory tree & files intact from the old machine to the new one. Still exactly the same message. What do I need to do to move the main interface with my BB to the new machine??

I wish - did that already, which is what I was referring to above when I said I installed "the proper release of 8700 software." I'm running Telstra on my 8700c, so figured that installing Desktop Manager, installing the (Telstra) Handheld Operating System (so all the registry variables should be correct) and then overwriting it with my old directory tree should work. That's the trick I use with several other programs to get everything running exactly as I had it. No luck here though.

Sorry for the belated reply, been too busy here lately! But thanks, NJ. Didn't do exactly what you suggested, but you pointed me in the right direction to solve the problem. Finding vendor.xml reminded me that there are TWO separate application directory trees that need to be transferred for it to work successfully. I had transferred C:/Program Files/Research in Motion/Blackberry (where all the Desktop Manager stuff is at) but had forgotten about C:/Program Files/Common Files/Research in Motion (where all the device software is at.)

Transferred both directory trees, and now its working again. Only have one issue now - Desktop Manager doesn't seem to know that there are any third party apps installed, all of which I installed from Desktop Manager in the past. Any way to fix that?